Add MessagingExtensionAttachmentLayout enum with "grid" support

[Copilot]

Aligns with teams.ts PR #381 to add "grid" layout support for messaging extensions while maintaining backward compatibility.

Changes

• New Enum: Created MessagingExtensionAttachmentLayout with values LIST = "list" and GRID = "grid"
• Updated Type: MessagingExtensionResult.attachment_layout now uses MessagingExtensionAttachmentLayout instead of AttachmentLayout
• Preserved Original: AttachmentLayout remains unchanged with LIST and CAROUSEL for backward compatibility
• Exports: Added MessagingExtensionAttachmentLayout to messaging_extension/__init__.py
• Test Updates: Updated test applications to use the new enum type

Usage

from microsoft.teams.api.models import (
    MessagingExtensionAttachmentLayout,
    MessagingExtensionResult
)

result = MessagingExtensionResult(
    attachment_layout=MessagingExtensionAttachmentLayout.GRID,  # New GRID option
    attachments=[...]
)

# AttachmentLayout.CAROUSEL still available for other use cases
from microsoft.teams.api.models import AttachmentLayout
# Existing code using AttachmentLayout.CAROUSEL continues to work

Note: This change maintains backward compatibility. Existing code using AttachmentLayout.CAROUSEL is not affected. Only messaging extension code needs to migrate to the new MessagingExtensionAttachmentLayout type.

Original prompt

can you change AttachmentLayout to be list | grid instead of list | carousel. Link microsoft/teams.ts#381 in the PR description.

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[heyitsaamir]

@copilot these are not helpful tests. Remove them.

[Copilot]

@copilot these are not helpful tests. Remove them.

Removed the test file in commit 1509aa2.

[Copilot]

Pull Request Overview

This PR updates the AttachmentLayout enum to align with the TypeScript implementation in teams.ts PR #381, changing the enum value from "carousel" to "grid".

Key changes:

• Updated AttachmentLayout.CAROUSEL to AttachmentLayout.GRID with value "grid"
• Updated docstring in the with_attachment_layout method to reflect the new enum value

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/api/src/microsoft/teams/api/models/attachment/attachment_layout.py	Changed enum member from CAROUSEL = "carousel" to GRID = "grid"
packages/api/src/microsoft/teams/api/activities/message/message.py	Updated docstring to reference "grid" instead of "carousel"

[heyitsaamir]

@copilot revert this change. Then introduce a NEW type called MessagingExtensionAttachmentLayout, and use THAT for the attachmentLayout in MessagingExtensionResult. Don't forget to export types as needed in __init__s.

[Copilot]

@copilot revert this change. Then introduce a NEW type called MessagingExtensionAttachmentLayout, and use THAT for the attachmentLayout in MessagingExtensionResult. Don't forget to export types as nee...

Reverted AttachmentLayout back to CAROUSEL and created new MessagingExtensionAttachmentLayout enum with GRID. Updated MessagingExtensionResult to use the new type and exported it in __init__.py files. Changes in commit 37a6a70.